/* Reset & Core Design System */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-app: #080c14;
  --bg-workspace: #0f131a;
  --bg-panel: rgba(20, 26, 38, 0.75);
  --bg-panel-solid: #141a26;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-active: rgba(99, 102, 241, 0.5);
  
  /* Text colors */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Neon Accents */
  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-accent-rgb: 99, 102, 241;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-success: #10b981;
  
  /* Shadows & blur */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
  --blur-amount: 14px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  line-height: 1.5;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.1);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* App Container Layout */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header styling */
.app-header {
  height: 48px;
  background: var(--bg-panel);
  backdrop-filter: blur(var(--blur-amount));
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  color: var(--color-accent);
}

.logo-section h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.badge {
  font-size: 0.65rem;
  font-family: 'Inter', sans-serif;
  background: rgba(99, 102, 241, 0.2);
  color: var(--color-accent);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-color-active);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.action-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.action-group label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.action-group input[type="number"] {
  width: 50px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 4px 6px;
  border-radius: 4px;
  text-align: center;
  font-size: 0.85rem;
}

.action-group input[type="number"]:focus {
  border-color: var(--color-accent);
  outline: none;
}

.divider {
  width: 1px;
  height: 20px;
  background: var(--border-color);
}

/* Button general styles */
button {
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 0 12px rgba(var(--color-accent-rgb), 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-secondary);
}

.btn-icon {
  background: transparent;
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 6px;
}
.btn-icon:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}
.btn-icon:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.btn-floating {
  background: var(--bg-panel-solid);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  font-size: 1.1rem;
}
.btn-floating:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-secondary);
}

.btn-text-only {
  background: transparent;
  color: var(--color-accent);
  font-size: 0.8rem;
}
.btn-text-only:hover {
  text-decoration: underline;
}

/* Dropdown Menu styling */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 0px;
  background-color: var(--bg-panel-solid);
  min-width: 180px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 101;
  overflow: hidden;
}

.dropdown-content a {
  color: var(--text-primary);
  padding: 10px 14px;
  text-decoration: none;
  display: block;
  font-size: 0.85rem;
  transition: background 0.15s;
}

.dropdown-content a:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--color-accent);
}

.dropdown:hover .dropdown-content {
  display: block;
}

/* Main Workspace Layout */
.main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - 48px);
}

/* Sidebars layout and styling */
aside {
  background: var(--bg-panel);
  backdrop-filter: blur(var(--blur-amount));
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px;
  z-index: 10;
}

.sidebar-left {
  width: 250px;
  border-right: 1px solid var(--border-color);
  box-shadow: 2px 0 10px rgba(0, 0, 0, 0.15);
}

.sidebar-right {
  width: 320px;
  border-left: 1px solid var(--border-color);
  box-shadow: -2px 0 10px rgba(0, 0, 0, 0.15);
}

.panel-section {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 10px;
}

.panel-section h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  padding-bottom: 4px;
}

/* Tool Grid (Left Sidebar) */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.tool-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  flex-direction: column;
  padding: 6px 4px;
  gap: 4px;
  border-radius: 8px;
  font-size: 0.72rem;
}

.tool-btn svg {
  stroke-width: 1.8;
  transition: transform 0.2s;
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

.tool-btn.active {
  background: rgba(99, 102, 241, 0.12);
  color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: inset 0 0 6px rgba(99, 102, 241, 0.15);
}

.tool-btn.active svg {
  transform: scale(1.1);
}

.tool-btn.danger:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-danger);
  border-color: var(--color-danger);
}

/* Select Box & Switch styling */
.select-group select {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px;
  border-radius: 6px;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}
.select-group select:focus {
  border-color: var(--color-accent);
}

.checkbox-group {
  margin-top: 10px;
}

.switch-container {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

/* Palette section custom color picker */
.palette-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.picker-wrapper {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.picker-wrapper input[type="color"] {
  -webkit-appearance: none;
  border: none;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  cursor: pointer;
  background: transparent;
}
.picker-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}
.picker-wrapper input[type="color"]::-webkit-color-swatch {
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 4px;
}

.picker-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Palette Grid */
.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  max-height: 120px;
  overflow-y: auto;
  padding-right: 2px;
}

.color-swatch {
  aspect-ratio: 1;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  position: relative;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}
.color-swatch:hover {
  transform: scale(1.1);
  box-shadow: 0 3px 6px rgba(0,0,0,0.4);
}
.color-swatch.active {
  border: 2px solid white;
  box-shadow: 0 0 0 2px var(--color-accent);
  transform: scale(1.05);
}
.color-swatch.transparent-swatch::after {
  content: '';
  position: absolute;
  width: 140%;
  height: 2px;
  background: var(--color-danger);
  transform: rotate(-45deg);
  top: 45%;
  left: -20%;
}

/* Selection operations styling */
.selection-ops {
  transition: max-height 0.3s ease-out, opacity 0.2s, padding 0.3s;
  overflow: hidden;
}

.selection-ops.collapsed {
  max-height: 0;
  opacity: 0;
  padding-top: 0;
  padding-bottom: 0;
  margin: 0;
  border: none;
}

.ops-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  margin-bottom: 8px;
}

.ops-grid button {
  padding: 6px 4px;
  font-size: 0.75rem;
}

.instruction-text {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.3;
}

/* Center Workspace / Canvas area */
.workspace-area {
  flex: 1;
  background-color: var(--bg-workspace);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  user-select: none;
}

/* Canvas background styling */
.canvas-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  position: relative;
  /* Add subtle blueprint grid look */
  background-image: 
    radial-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 0),
    radial-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 0);
  background-size: 20px 20px;
  background-position: 0 0, 10px 10px;
}

canvas#editor-canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
  cursor: crosshair;
  background-color: transparent;
  transition: transform 0.05s ease-out;
}

/* Floating Controls (Zoom UI) */
.canvas-floating-controls {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--bg-panel);
  backdrop-filter: blur(var(--blur-amount));
  border: 1px solid var(--border-color);
  padding: 4px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-md);
  z-index: 50;
}

#zoom-indicator {
  font-size: 0.8rem;
  font-weight: 600;
  width: 42px;
  text-align: center;
  color: var(--text-secondary);
}

/* Status / Helper Bar (Bottom of canvas) */
.canvas-status-bar {
  height: 28px;
  background: var(--bg-panel-solid);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 16px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  z-index: 50;
}

.status-left {
  display: flex;
  gap: 16px;
}

/* Symmetry settings (Right Sidebar) */
.symmetry-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.chk-card {
  cursor: pointer;
  position: relative;
}

.chk-card input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.chk-card .card-content {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 10px 6px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  transition: all 0.2s;
}

.chk-card:hover .card-content {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--text-secondary);
}

.chk-card input[type="checkbox"]:checked + .card-content {
  background: rgba(99, 102, 241, 0.12);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.chk-card .icon {
  font-size: 1.25rem;
  font-weight: 500;
}

.chk-card .label {
  font-size: 0.75rem;
}

/* Image Import file Drop Zone */
.file-drop-zone {
  border: 2px dashed var(--border-color);
  background: rgba(0, 0, 0, 0.15);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}
.file-drop-zone:hover, .file-drop-zone.dragover {
  border-color: var(--color-accent);
  background: rgba(99, 102, 241, 0.05);
  color: var(--text-primary);
}
.file-drop-zone p {
  font-size: 0.8rem;
}
.file-drop-zone p span {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
}

/* Image Options block */
.image-options {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: max-height 0.4s ease-out, opacity 0.2s;
  overflow: hidden;
}

.image-options.collapsed {
  max-height: 0;
  opacity: 0;
  margin-top: 0;
  pointer-events: none;
}

.preview-box {
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

#img-preview-canvas {
  max-width: 100%;
  max-height: 120px;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  background: #111;
  border-radius: 4px;
}

.dimension-tag {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: rgba(0, 0, 0, 0.7);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.65rem;
  color: var(--text-secondary);
}

.control-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.control-row input[type="number"] {
  width: 50px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 4px 6px;
  border-radius: 4px;
  text-align: center;
}

.control-row select {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 4px;
  border-radius: 4px;
  font-size: 0.8rem;
}

.action-buttons {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 8px;
  margin-top: 4px;
}

.action-buttons button {
  padding: 8px;
}

/* Bill of Materials styling */
.bom-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.bom-cost-config {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  background: rgba(0, 0, 0, 0.2);
  padding: 6px;
  border-radius: 6px;
}

.bom-cost-config input[type="number"] {
  width: 60px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 0.8rem;
}

.bom-table-wrapper {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 6px;
}

.bom-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.75rem;
  text-align: left;
}

.bom-table th, .bom-table td {
  padding: 8px 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.bom-table th {
  background: rgba(0, 0, 0, 0.3);
  color: var(--text-secondary);
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 2;
}

.color-preview-cell {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bom-color-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.bom-hex-label {
  font-family: monospace;
}

.total-row {
  font-weight: 600;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--border-color);
}

.total-row td {
  border-bottom: none;
}

/* Print Instructions styling overlay */
.print-only {
  display: none;
}

@media print {
  body {
    background: white;
    color: black;
    height: auto;
    overflow: auto;
  }
  .app-container {
    display: none;
  }
  .print-only {
    display: block;
    padding: 30px;
    font-family: 'Inter', sans-serif;
  }
  .print-header {
    border-bottom: 2px solid #333;
    padding-bottom: 12px;
    margin-bottom: 20px;
  }
  .print-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.8rem;
    color: #111;
  }
  .print-meta {
    margin-bottom: 24px;
    font-size: 0.9rem;
    color: #555;
    display: flex;
    gap: 20px;
  }
  .print-bom h3, .print-instructions h3 {
    margin-bottom: 12px;
    font-size: 1.2rem;
    color: #222;
    border-bottom: 1px solid #ddd;
    padding-bottom: 4px;
  }
  .print-bom {
    margin-bottom: 30px;
  }
  .print-bom-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    font-size: 0.85rem;
  }
  .print-bom-table th, .print-bom-table td {
    border: 1px solid #ddd;
    padding: 8px 12px;
    text-align: left;
  }
  .print-bom-table th {
    background-color: #f5f5f5;
  }
  .print-color-square {
    display: inline-block;
    width: 18px;
    height: 18px;
    border-radius: 3px;
    border: 1px solid #777;
    vertical-align: middle;
  }
  .instructions-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-family: monospace;
    font-size: 0.8rem;
  }
  .instruction-row {
    padding: 4px 0;
    border-bottom: 1px dashed #eee;
  }
}